Functions Of The Digestive System

Question 1

What is the function of the mouth

Answer 1

Breakdown foodstuffs, salvia added as lubricant

Question 2

Function of esophagus

Answer 2

Conduit between mouth and stomach (can also move fluids back up the way)

Question 3

Function of the stomach (4)

Answer 3

Storage
digestion of proteins
reduce foodstuffs to liquid form (chyme)
sterilisation (secretes HCl which kills microorganisms)

Question 4

Function of pancreas

Answer 4

Produce digestive enzymes for digestion of fats, carbohydrates and proteins

Question 5

Function of liver

Answer 5

Produce bile salts for the digestion/absorption of fats in small intestine

Question 6

Function of gallbladder

Answer 6

Stores and concentrates bile

Question 7

Function of small intestine

Answer 7

Final stages of chemical digestion and nutrient absorption

Question 8

Function of large intestine (3)

Answer 8

Water absorption
bacterial fermentation
formation of faeces

Question 9

What is motility

Answer 9

Process of moving food from mouth to anus

Question 10

What are the 4 layers of the alimentary canal? (These have same structural arrangement throughout length)

Answer 10

innermost to outermost:

Mucosa
Submucosa
Muscularis externa
Serosa/adventitia

Question 11

What are the 3 layers of the mucosa

Answer 11

Epithelium
Lamina propria (loose connective tissue)
Muscularis mucosa (very little function)